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题名: Cosmological models with Lagrange multiplier field
作者: Gao, CJ ;  Gong, Y ;  Wang, X ;  Chen, XL
刊名: PHYSICS LETTERS B
出版日期: 2011
卷号: 702, 期号:41308, 页码:107-113
关键词: HOLOGRAPHIC DARK ENERGY ;  PREFERRED-FRAME THEORIES ;  EQUATION-OF-STATE ;  RELATIVISTIC GRAVITY ;  COSMIC ACCELERATION ;  CONSERVATION LAWS ;  UNIVERSE ;  CONSTANT ;  QUINTESSENCE ;  TRANSITION
学科分类: Physics
通讯作者: Gao, CJ (reprint author), Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China.
部门归属: [Gao, Changjun; Gong, Yan; Wang, Xin; Chen, Xuelei] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China; [Gao, Changjun; Chen, Xuelei] CAS, Kavli Inst Theoret Phys China, Beijing 100190, Peoples R China; [Gong, Yan; Wang, Xin] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China; [Chen, Xuelei] Peking Univ, Ctr High Energy Phys, Beijing 100871, Peoples R China
英文摘要: We first consider the Einstein-aether theory with a gravitational coupling and a Lagrange multiplier field, and then consider the non-minimally coupled quintessence field theory with Lagrange multiplier field. We study the influence of the Lagrange multiplier field on these models. We show that the energy density evolution of the Einstein-aether field and the quintessence field are significantly modified. The energy density of the Einstein-aether is nearly a constant during the entire history of the Universe. The energy density of the quintessence field can also be kept nearly constant in the matter dominated Universe, or even exhibit a phantom-like behavior for some models. This suggests a possible dynamical origin of the cosmological constant or dark energy. Further more, for the canonical quintessence in the absence of gravitational coupling, we find that the quintessence scalar field can play the role of cold dark matter with the introduction of a Lagrange multiplier field. We conclude that the Lagrange multiplier field could play a very interesting and important role in the construction of cosmological models. (C) 2011 Elsevier B.V. All rights reserved.
资助者: National Science Foundation of China [10533010, 10575004, 10973014]; 973 Project [2010CB833004]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000293928600001
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/14291
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Recommended Citation:
Gao, CJ,Gong, Y,Wang, X,et al. Cosmological models with Lagrange multiplier field[J]. PHYSICS LETTERS B,2011,702(41308):107-113.
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